Country-scoped proxy selection in FourA MCP
FourA MCP 0.5.0 adds strict country-scoped selection to foura_proxy. Pass exitCountries with the target-visible countries you need. A scoped success returns exitCountry and the reusable proxy ID, which you can pass to foura_browser when the page needs JavaScript. If the current pool has no match, no_eligible_proxy preserves the requested scope instead of silently falling back. Existing calls without exitCountries keep their previous behavior.